Smoking pipe



E. CALDWELL Dec. 19, 1933.

SMOKING PIPE Filed Feb. 20. 1930 able.

Patented Dec. 19, 1933 UNITED STATES PATENT OFFICE 'This inventionrelates to an improved smoking pipe and has for its principal object toprovide a plpeof such construction as will insure the delivery of smokehaving` properties insuring a better taste than has heretofore beenobtainpresent in both solid and liquid form. Coolness' of the smokeis'obtained in the improved construction in two Ways, namely, bypermitting Y radiation of heat units from the smoke during its traveland by adding to the smoke stream av controlled amount of air.

In accordance with the invention there is provided a tube ofimproved'construction by which the -smoke is necessarily purified in itstravel from the bowl to the mouth piece. lThis tube is disposed in thebore of the pipe and is so designed in relation thereto as to insure thedesired interaction. The travel of the smoke through this tube is alonga path not provided heretofore in pipe structure in that the smokereceived directly from the bowl emergesfrom the tube at a pointVrelatively remote from'the bowl and after passing through the chamberwithin the boreY of the pipe reenters the tube at a point relativelynear the bowl for a' travel rearwardly into the mouth piece. It islargely by means of the relationship of passages and ports in theimproved tube that the removal of objectionable constituents ofthe smokeis brought about before it is delivered to the mouth piece.

A further object of the invention is to provide in a pipe structure* anopening by which air may be directly introduced into the smoke streamfor cooling and dilutingmit. v In thepreferred embodiment of thisfeature the air port is controllable in size so that the quantity of airthus admitted can be conveniently regulated using relatively movableparts of the pipe to constitute a valve.V In accomplishing this Vpurposeit is preferred that the air opening shall extend throughl the pipe stemand the mouth piece `so,

- inviting this in order that taste variations in The physicalcharacteristics of smoke the smoke can be accomplished by the smoker tosuit his whim.

A further object of the inventionvis toprovide an improved tube for thepurposes set forth which shall be simpleY and inexpensive in structureandV lend itself conveniently to assembly and attachment Within theVmouth piece, its free end being of a character to cooperate with the Yinner end of the pipe bore `to seal the chamber'.

within the bore against direct admission of smoke thereinto. t

Still another object of the invention is to conjstruct the improved tubein such form that baiiles will be provided at such points as insure mosteiective action in accomplishing the objects and yet shall be of such anature as not to interfere with the most convenient cleaning of the tubepassages and the mouth piece. n Still another object ofthe invention isto provide indicia on the pipe by means of which the smoker candetermine the relativeV extent Yopening of the air valve, such indiciainone form, forinstance, appearing as a Vernier scale on the mouth pieceadjacent to the tenon.

Another object of the invention is to improve the construction of themouth piece at its tip by making it sectional and of metal or mouldedcomposition for engagement with the mouth piece.` f

These and other objects of the invention will appear at greater lengthhereinafter in connec-v tion with the detailed kdescription of the`preferred embodiment shown in the accompanying drawing,'in which: y y

Figurel is a view in side elevation of the im proved pipe, parts beingbroken away to showthe improved tube and its relation to the bowl andbore of the pipe stem in normal condition.

Figure 9 is a sectional view of the tip of the mouth piecetaken on theplane indicated by the line 9 9 of Figure 1 and looking in the direction.of the arrows.

The` improved pipe comprises a bowl a having a stem b and a mouth piecec joined detachably with the stem through the tenon c in accordance withusual practice. The smoke from the burning tobacco within the bowl a isdrawn through Y improved Vtube indicated generally at d and to be laterdescribed, this tube being of lesser diameter than the chamber Z2 andadapted to engage the end wall b2 of the chamber to prevent smoke fromthe passage o' entering directly into the chamber. A convenient andeffective relationship to accomplish this purpose is illustrated inFigure 2 wherein the end of the chamber b is shown as countersunk as atb3 to receive snugly the end of the tube d, the dimensions of the partsbeing such as to insure contact sulicient to prevent smoke in anyappreciable quantity passing from the passage a directly into thechamber b1. As a matter ofV fact the tarry distillates from the burningsmoke will assist in creating an effective smoke seal at this point. v

Having now described the general relationship of parts emphasis will beplacedon the details of the improvedtube by which the noxious liquidsand solids within the smoke are extracted therefrom to the greatestpossible extent When'it emerges through the opening a and before itenters the mouth piece c. The tube d is themedium by which thispurification of the smoke is attained. It will be understood as thedescription of the tube `is given that the desired result might beobtained by tubes of other constructions butnevertheless the form oftube illustrated is believed to possess many advantages from thestandpoint ofV manufacture and assembly. Whatre-entry of the smokestream into the tube at av point relatively nearer to the pipe bowl andcontrariwise, relatively more remote from the mouth piece. A tube whichprovides such a path o1' travel'for 'the smoke stream is by no means asimple one to manufactureand assemble considering that not only mustbailles be incorporated therein but easy cleaning must be assured. Itmay be doubted whether a satisfactory tube answering the requirementscould be formed commercially from a single piece of metal and for thatreason the provision of a'sectional tube is thought to have considerablemerit and novelty.

Referring to Figures l and 8 it will be seen that the tube d is providedwith openings d and d2 in its wall, these openings being 180 apart andspaced unequal distances from the ends of the tube. It is` desired tobring about the passage of smoke sothat it will emerge from the openingd and re-enter the tube through the opening d2.

, This means, of course, that the interior of the tube may be of suchconstruction that no communication between these two openings isafforded interiorly. A core piece e is illustrated in Figure 8 which isof such constructionthat it may beintroduced in to the tube d and bepermanently -united therewith so that distinct and separate passageswithinthe tube d are constituted in the desired relationship. The core ewhich is solid is of the same diameter as the interior of the tube b soas to lit snugly therewithin and yet considered as a solid rod it hassections cutout to constitute, with the interior wall of the tube d thenecessary channels. For instance, on one side of the core e there isprovided a flat wall forming with the upper portion of the wall of thetube d a channel f which terminates in the opening d. lAn angular face eon this part of the core e constitutes a baille terminating in andcoinciding with the edge of the openingd as appears clearly from Figure2. The underside of the core e, but at a point remote from its end, isformed somewhat the converse of the part described above so that whenthe core is introduced snugly into the tube d a second channel g' willbe provided communicating with the other opening d2. This channel gterminates in an extended central bore e2 within a tubular extension e3of the core e, as appears clearly from Figures 2 and 8. This tubularextension e3 is preferably serrated as at e4 and of such diameter as topermit it to be driven into the counterbore of the mouth piece c andthereby permanently united therewith. In the same manner it has beensought to make clear the core e is permanently united with the tube dthrough a drive t. Thus the tube d considered as a unit with itsinterior channels f and g formed askdescribed is permanently united withthe mouth piece and adapted for introduction into the chamber D andremoval therefrom with the mouth piece as its tenon c is engaged ordisengaged from the stem b. y v

Thus far considerable emphasis has been placed on the structure of thetube d as viewed from the standpoint of simplicity and ease inmanufacture and assembly. A description will now be given of its mode offunctioning in bringing out theA separation out of the noxious matter inthe smoke. As explained before, the end of the tube b brings about aseal at the inner end of the chamber b so that the smoke cannot enterthe chamber directly from the port a.

Accordingly, the smoke must rst pass through the channel f until itescapes into the chamber b through the opening d in the tube, the barilee serving to assist in deflection of the smoke from a straight pathradially outward and against the wall of the chamber b as appearsclearly from Figures 2 and 5. This abrupt change in direction of thesmoke coupled with its deilection radially and engagement with the wallof the chamber b brings aboutan immediate deposition of liquid and solidnoxious matter from the smoke. The smoke expands into the larger chamberb and creeps along its supercially extended and relatively cool wallwith the result that the greatest possible separation out of noxiousmaterial is accomplished. In order to get to the mouth piece smoke hasto re-enter the tube through the opening d2. This opening, as pointedout before, being relatively nearer to the bowl of the pipe than theopening d', the smoke must completely reverse its direction of travelafter emerging into the chamber yb and move along the walls of thechamber and trav- From the opening d2 the reason of the improved tubeconstruction, enter theV mouth piece c since their relation to thechannel g Within the tube precludes this. They are thrown downwardlyeffectively from the smoke by reason of its path of travel as ex-,plained. Thus 'at thispoint purification of the smoke is accomplishedand great improvement in its taste assured since the taste is largelydependent on the purity of the smoke. In accomplishing this purificationit will be understood that cooling of thevsmoke by conduction is also anecessary incident, the extended wall of the chamber b' and the extendedsurfaces of the channels along which the smoke must pass insuring thisamount of cooling before the smoke goes into the mouth piece. However,the present invention contemplates an additional and direct cooling ofthe smoke and its dilution of oxygenation by the introduction of airinto the smoke stream at a point after its cleansing. Such cooling willalso contribute to a pleasant taste since the coolerthe smoke is themore agreeable the taste although, of course, there isV a point beyondWhich dilution of the smoke should not be carried. To suit the taste ofthe individual, therefore, it preferred that the airv added may beadmitted in a quantity Within the control of the smoker. In theillustrated embodiment this is done by simple means taking advantage -ofthe normal relationship between the mouth piece and the pipe steam. Asshown in Figures 2 and 6 an opening b4 is provided at some point in thepipe stem overlying the tenon c'. It is believed that the top of thepipe stein will prove to be a desirable place to locate the opening b4since in this location the pipe juice Within the chamber b' cannotaccidentally leak through the opening b4 and also this location enablesthe finger of the smoker to be most conveniently placed over the hole,if desired, for taste experiments to suit his whim. The tenori c' isprovided with an opening c2 which is preferably the same dimension andcross sectional form as the opening b4 and forms a continuation thereofand the tube e3 has a similar opening e5 so Vthat air may enter from theoutside into the smoke stream flowing through the bore e2. For theconvenience of the smoker as shown in Figure l parts of an arrow may beplaced on the sternb and the mouthpiece c so that when the parts are inalignment the openings c2 and b4 Will be in complete registry for theadmission of kthe maximum quantity of air. Graduations indicated at c3may be formed on the mouth piecec at opposite sides of the median lineshown as part of the arrow so that by rotating the mouth piece c to oneside or the other of the median position the opening c2 can be offsetfrom the opening b4 to a desired extent to restrict the iniiow of air.The smoker will, of course, determine the quantity of air which createsa blend of smoke most agreeable to his taste and he may, indeed, findthat his taste is served at different times of the day or on differentdaysV by a change in the quantity of air with a'resulting change in theblend. The point is that taste can be catered to in this fashion bymeans wholly Within the control of the smoker. In the same manner itWill be evident that the smokers finger may be placed over the openingVb4 if he desires momentarily to restrict the infiow of air. Tofacilitate this the opening b4 may be countersunk as indicated at b5 toassist in locating the opening.

The passages f and g within the tube d, it will be observed, are sorelated to the openings that the greatest convenience is afforded incleaning them as by the inroduction of a pipe cleaner. Thus, a pipecleaner may be run through the bore of the mouth piece c and guidedwithout restriction through the channel g emerging at the opening d2.Similarly, a pipe cleaner may be inserted through the passage ,f withouthindrance by introducing either through the opening d' or at the inletend.

The result of the provisions herein described is that a dry smokeVexceedingly clean may be further cooled and diluted or blended oroxygenated to any desired extent by the direct addition of air thereintoin its travel through the mouthpiece.

A further feature of construction resides, as a detail, in the inclusionin the mouth piece of a tip h of metal or moulded composition unitedwith the mouth piece c by any convenient means facilitating this. Thistip may be of such material as to resist injury from the teeth or maypermit replacement when and if injured.

The invention is not to be limited to details of construction exceptinsofar as recited in the appended claims.

What I claim is:

1. A tube of the character specified comprising a cylinder havingopenings through its Walls and a core secured within said cylinder andso formed as to constitute independent smoke passages interiorly of thecylinder communicating with the respective openings therein.

2. A tube of the character specified comprising a cylinder havingopenings through its walls and a core secured within said cylinder andso formed as to constitute independent smoke passages interiorly of thecylinder communicatingr With the respective openings therein, said corehaving inclined surfaces along said passageways to constitute bafflesfor the smoke.

3. A` tube of the character specied comprising a cylinder havingopenings. through its walls and a core secured Within said cylinder andso formed as to constitute independent smoke passages interiorly of thecylinder communicating with therespective openings therein,` said coreterminating in a tubular extension secured within the mouth piece.

4. In a pipe having a stem and a mouth piece eneageable therewithregistering openings through the stem and mouth piece to admit air intothe smoke stream, said openings being relatively displaceable by angularmovement of the mouth piece in the stem, indicia carried on the stem andmouth piece to indicate visually the extent of the relative angulardisplacement therebetween.

EDWIN CALDWELL.A

